The Loch Ness monster

Many times we have been in a dilemma whether to believe or not someone who tries to persuade us for something and very often by listening his arguments and by having enough evidence we finally manage to get out of the dilemma. Nevertheless sometimes we cannot be sure about an event because although there is enough evidence, our minds cannot be persuaded. An example to justify that is the existence of the Loch Ness monster, or as it is widely known “Nessie”.
Nessie’s story begins from the first century A.D, when Romans first went to Northern Scotland and found carved, standing stones (which are still found in the region around Loch Ness) that represented animals, which were all easily recognizable, except one. The exception was a strange beast with an elongated beak or muzzle and flippers instead of feet (see photograph 1) Described by some as a swimming elephant, this beast is the earliest evidence that Loch Ness is home to a mysterious animal.
The earliest written reference that verified the existence of a mysterious aquatic animal in Loch Ness is in the biography of Saint Columba, who in A.D. 565 on his way to visit the king of Picts (the people who lived at the coast of Loch then), stopped along the shore of Loch Ness to rest and saw a large beast ready to attack a man who was swimming in the lake. He immediately raised his hand, calling the name of God and commanded the beast to “go back with all his speed”. The beast obeyed and the swimmer was saved.
However it was in 1933 that a sighting occurred that made Nessie famous. In 1933 Mr. Spicer and his wife were driving by Loch Ness when they saw a creature crossing the road, a creature unlike any they had ever seen before. They described the beast as having a long neck followed a large body (see photograph 2) and they watched it until it left the road and entered the water.
Besides the Spicer sighting there was a plethora of sightings of Nessie. One of those is the sighting of a motorcyclist, Mr. Grant, on the 4th of January 1934. It was around one a.m. and was bright because of the moonlight when he saw a large object on the right side of the road. As he approached the object he saw a small head attached to a long neck. The animal must have seen Mr. Grant and went back to the Loch.
Another event on the 5th of June 1935, which is considered to be of importance, involved a young girl who worked as a maid in a large house close to a monastery. It was around 6:30 a.m. and she was looking out of a window down the Loch. She saw on the shore “one of the biggest animals she had seen in her life” at an extend of about 200 yards. Her description was similar to those of the others: “long neck, small head, skin like an elephant and two very short fore legs or flippers”. She watched for about 20 minutes when it entered the water and disappeared.
Another eyewitness account happened in October 1955, by Colonel Patrick Grant of Knockie estate. He saw near the bay “a great commotion in the water between 100-200 yards from the road”. He stopped his car and he could see “a black object above the surface 10 or 15 feet long. In less than a minute the object suddenly started swimming eastwards, parallel with the shore and very near the surface submerged. Moving at a great speed it traveled 200-300 yards and disappeared completely”.
Although there have been hundreds of sightings of Nessie as the above, lots of people tried to take evidence so as the existence of Nessie will truly be a mystery. Many photographs have been taken and from that time more and more people start discussing about that mystery.
The first photograph was taken in 1934, a year after the first sighting of Nessie, and it was the one that stood above the rest because it is the only photograph that actually shows Nessie. It shows the thin neck of an animal rising from the surface of the water (see appendix 3). From the moment it